CN211646945U

CN211646945U - Superimposed shear wall prefabricated member

Info

Publication number: CN211646945U
Application number: CN201922265002.4U
Authority: CN
Inventors: 马荣全; 和超; 孙伯禹; 赵卫; 王洪强; 张吉华
Original assignee: Sany Construction Technology Co Ltd
Current assignee: Sany Construction Technology Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-10-09
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a superimposed shear wall prefab, including first wall body and second wall body, retention device and shaping steel reinforcement cage. The first wall body and the second wall body are formed by pouring concrete; the first wall body and the second wall body are arranged in parallel at intervals to form a cavity. The blocking device is attached to the inner side face of the first wall body and/or the inner side face of the second wall body and is combined with concrete to form a whole. The forming reinforcement cage is arranged between the first wall body and the second wall body; the formed reinforcement cage comprises reinforcements extending towards two sides and reinforcements arranged in the cavity; and reinforcing steel bars extending out of one side of the formed reinforcing cage are embedded into the first wall body, and reinforcing steel bars extending out of the other side of the formed reinforcing cage are embedded into the second wall body. The disclosed superposed shear wall prefabricated member ensures the completeness of the member in the member hoisting process, is stable in structure, still keeps stable in structure and does not deform in the vibration process, and is not easy to crack or damage.

Description

Superimposed shear wall prefabricated member

Technical Field

The present disclosure relates to the field of construction of building elements, and more particularly, to a prefabricated member for a laminated shear wall.

Background

The fabricated building refers to a building fabricated at a construction site using prefabricated parts. Superimposed shear walls are prefabricated components commonly used in prefabricated building construction. Compared with a solid wall with the same size, the superposed shear wall has lighter self weight. This also makes it possible to install the semifinished products on the site with cranes of lower bearing capacity. Furthermore, the transportation cost of transporting the laminated shear wall to a construction site is lower compared to a solid concrete prefabricated part. Therefore, the superposed shear wall is widely used as a load-bearing wall preform.

However, the first wall body and the second wall body of the existing composite shear wall are connected by truss ribs or common steel bars, and are easy to crack or damage in the transportation and hoisting processes.

SUMMERY OF THE UTILITY MODEL

To solve or at least alleviate at least one of the above technical problems, the present disclosure provides a laminated shear wall preform.

According to one aspect of the present disclosure, a laminated shear wall preform comprises:

the first wall body and the second wall body are formed by pouring concrete; the first wall body and the second wall body are arranged in parallel at intervals to form a cavity;

the blocking device is attached to the inner side surface of the first wall body and/or the second wall body and is combined with concrete to form a whole; and

the forming reinforcement cage is arranged between the first wall and the second wall; the formed reinforcement cage comprises reinforcements extending towards two sides and reinforcements arranged in the cavity; and reinforcing steel bars extending out of one side of the formed reinforcing cage are embedded into the first wall body, and reinforcing steel bars extending out of the other side of the formed reinforcing cage are embedded into the second wall body.

According to at least one embodiment of the present disclosure, the blocking means is a sheet-like part or a hollow housing-like part extending along a plane.

According to at least one embodiment of the present disclosure, the blocking device employs a quick and easy drawdown net.

According to at least one embodiment of the present disclosure, the shaped rebar cage comprises:

the first reinforcing mesh is embedded in the first wall body;

the second steel bar net is buried in the second wall body; and

the ladder rib is arranged between the first wall body and the second wall body; the two sides of the ladder rib are provided with extending reinforcing steel bars, and the extending reinforcing steel bars are respectively connected with the first reinforcing steel bar net piece and the second reinforcing steel bar net piece.

According to at least one embodiment of the present disclosure, the ladder bar includes:

the two framework reinforcing steel bars are arranged in parallel, are positioned in the cavity and are attached to the inner side of the blocking device or the concrete; and

the connecting steel bars are perpendicular to the framework steel bars and are fixedly connected with each framework steel bar respectively; the two ends of the connecting steel bars extend out of the outer side of the framework steel bars respectively and are connected with the first steel bar mesh and the second steel bar mesh.

According to at least one embodiment of the present disclosure, both ends of the connection bar form hooks.

According to at least one embodiment of the present disclosure, the ladder bar is provided in plurality, and the framework reinforcing bar is arranged in the longitudinal direction or the transverse direction of the wall body.

According to at least one embodiment of the disclosure, door and window openings are formed in corresponding positions of the first wall body and the second wall body; hole edge concrete integrated with the first wall body and the second wall body is poured on the peripheral edge of the door and window hole; the blocking device is attached to the inner side of the concrete at the edge of the hole and is combined with the concrete to form a whole.

According to at least one embodiment of the present disclosure, the formed reinforcement cage further includes a third reinforcement mesh, and the third reinforcement mesh is embedded in the concrete at the edge of the opening.

According to at least one embodiment of the present disclosure, the angle of the hook connecting both ends of the reinforcing bar is 135 °.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a perspective view of an exemplary embodiment of the disclosed laminated shear wall preform.

FIG. 2 is a schematic cross-sectional profile view of an exemplary embodiment of the disclosed overlapping shear wall preform.

Fig. 3 is a schematic cross-sectional view at a door opening and window opening of an exemplary embodiment of the disclosed laminated shear wall preform.

Fig. 4a and 4b are schematic diagrams illustrating a first state of the disclosed manufacturing process of the laminated shear wall prefabricated member. Fig. 4a is a side view and fig. 4b is a top view.

Fig. 5a and 5b are schematic diagrams illustrating a second state of the disclosed manufacturing process of the laminated shear wall prefabricated member. Fig. 5a is a side view and fig. 5b is a top view.

Fig. 6a and 6b are schematic diagrams illustrating a third state of the manufacturing process of the laminated shear wall prefabricated member of the present disclosure. Fig. 6a is a side view and fig. 6b is a top view.

Fig. 7a and 7b are schematic views of a fourth state of the manufacturing process of the laminated shear wall prefabricated member of the present disclosure. Fig. 7a is a side view and fig. 7b is a top view.

Description of reference numerals:

1-ladder reinforcement; 2-reinforcing mesh; 3-a blocking device; 4-door and window openings; 5-welding spots; 6-precast concrete; 7-connecting reinforcing steel bars; 8-a mould table; 9-side molding; 10-first wall concrete; 11-second wall concrete; 12-opening edge concrete; a-a first wall; b-a second wall.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The existing structure of the laminated shear wall generally comprises a first wall body a and a second wall body B, wherein the first wall body a and the second wall body B are arranged in parallel at intervals. The first wall body A and the second wall body B are formed by pouring concrete, truss ribs or common steel bars are arranged between the first wall body A and the second wall body B and are respectively embedded into the first wall body A and the second wall body B, and the first wall body A and the second wall body B are connected by means of the truss ribs or the common steel bars. The superposed shear wall with the structure is easy to crack or damage if being subjected to large jolts or vibrations in the transportation and hoisting processes.

Accordingly, the present disclosure is directed to a laminated shear wall preform that seeks to solve, or at least mitigate, at least one of the above-mentioned problems, and to a method of manufacturing a laminated shear wall preform.

In the application document of the present disclosure, for convenience of describing the position relationship of each component in the laminated shear wall prefabricated member, the vertical height direction of the laminated shear wall prefabricated member is referred to as the longitudinal direction or the vertical direction by taking the position of the laminated shear wall prefabricated member after being constructed in place as a standard; the left and right width directions of the superposed shear wall prefabricated member are called as transverse or horizontal directions; the thickness direction of the superposed shear wall prefabricated member is vertical to a plane formed in the vertical direction and the horizontal direction, namely, the superposed shear wall prefabricated member is vertical to a wall surface.

Referring to fig. 1 and 2, a perspective block diagram and a cross-sectional cutaway schematic view of an exemplary embodiment of the present disclosure of a laminated shear wall preform according to an aspect of the present disclosure are shown. The utility model provides a superimposed shear wall prefab, includes first wall body A, second wall body B, blocking device 3 and shaping steel reinforcement cage. The first wall body A and the second wall body B are both formed by pouring precast concrete 6. The first wall body A and the second wall body B are spaced in parallel, and a cavity is formed between the two wall bodies. The cavity is used for casting concrete in situ in the cavity to form a laminated wall body during construction. The first wall body A and the second wall body B are both provided with two surfaces, namely an inner side surface and an outer side surface, the inner side surface faces the cavity, and the outer side surface faces the outside. The blocking device 3 is attached to the inner side surface of the first wall body A and/or the second wall body B and is combined with concrete to form a whole. The blocking device 3 is used for preventing the precast concrete 6 from passing through the blocking device 3 when the first wall body A and/or the second wall body B are formed by pouring, so that a cavity between the two wall bodies is formed, meanwhile, the blocking device 3 is combined with the precast concrete 6 to form a whole to serve as a support of the precast concrete 6, and the structural strength of the two wall bodies is improved. Alternatively, the blocking device 3 may be a sheet structure extending along a plane and attached to the inner side of the first wall a or the second wall B, or two blocking devices 3 may be attached to the inner sides of the first wall a and the second wall B at the same time. It will be readily appreciated that the blocking means 3 are arranged to cover the entire inner side, with a cavity being formed between one blocking means 3 and the inner side of the opposite wall, or between two blocking means 3. Under the condition that the inner side surfaces of the first wall body A and the second wall body B are both attached with the blocking device 3, the blocking device 3 can also adopt a hollow shell structure, the wall of the shell of the blocking device 3 is attached with the inner side surfaces of the first wall body A and the second wall body B, and the inner space of the shell forms a cavity; one or both ends of the shell facing the top and bottom of the wall are open (not sealed) so that concrete can be poured into the cavity during construction. The formed reinforcement cage is arranged between the first wall body A and the second wall body B. The formed reinforcement cage is provided with two sides in the thickness direction of the wall body, and comprises reinforcements extending towards the two sides and reinforcements arranged in the cavity; reinforcing steel bars extending out of one side of the formed reinforcing cage are embedded into the first wall body A, and reinforcing steel bars extending out of the other side of the formed reinforcing cage are embedded into the second wall body B, so that the first wall body A and the second wall body B are connected through the formed reinforcing cage to form an integral structure. It is easy to understand, and the shaping steel reinforcement cage is formed by the reinforcing bar processing, and under the condition that the medial surface laminating of first wall body A and/or second wall body B was provided with blocking device 3, the reinforcing bar of shaping steel reinforcement cage passed blocking device 3 and stretched into in the wall body, and blocking device 3 and shaping steel reinforcement cage formed a whole. Optionally, the formed reinforcement cage may adopt a form of two reinforcement meshes 2 and a ladder bar 1, or a form of two reinforcement meshes 2 and a form of connecting reinforcements 7 therebetween.

In the disclosed superimposed shear wall prefab, the medial surface laminating of first wall body A and/or second wall body B sets up blocking device 3, blocking device 3 combines with the concrete to form wholly, the structural strength of two wall bodies has structurally been increased, the shaping steel reinforcement cage passes blocking device 3 and buries in the wall body, shaping steel reinforcement cage and blocking device 3 combine to form wholly, the integrality of component hoist and mount in-process component has been guaranteed, stable in structure just still keeps stable in structure indeformable at the vibrations in-process, be difficult to the fracture or damage.

In one embodiment of the present disclosure, the blocking device 3 may be a sheet-like member extending along a plane or a hollow case-like member.

In each of the above embodiments, the blocking device 3 may be a quick and easy necking net. The fast and easy closing net is a form net without detaching, after concrete is poured, it can be permanently combined with concrete, after concrete is poured, the angle-shaped joggle of its hole net can be automatically inserted. The concrete can not reach the other side through the meshes, and the concrete has a blocking effect.

In one embodiment of the present disclosure, the formed reinforcement cage includes a first reinforcement mesh 2, a second reinforcement mesh 2, and a ladder bar 1. The first steel mesh 2 is embedded in the first wall A; the second steel mesh 2 is buried in the second wall body B. Reinforcing bar net piece 2 can adopt the reinforcing bar processing machine to process, and is efficient. The ladder bar 1 is arranged between the first wall A and the second wall B. Ladder muscle 1 can the level set up also can vertical setting, and ladder muscle 1 has both sides in the thickness direction of wall body, and the both sides of ladder muscle 1 are equipped with the reinforcing bar that stretches out, and the reinforcing bar that stretches out is connected with first reinforcing bar net piece 2 and second reinforcing bar net piece 2 respectively. The ladder bar 1 functions as a support for the blocking device 3 and the precast concrete 6 wall. Ladder muscle 1 also can process through reinforcing bar processing machine, and is efficient, has avoided the manual work to carry out the welded difficulty one by one.

Further, the ladder reinforcement 1 comprises two parallel framework reinforcements and a plurality of connecting reinforcements 7. Two parallel framework steel bars are positioned in the cavity and attached to the inner side of the blocking device 3 or the concrete. Two framework reinforcing steel bars which are arranged in parallel are respectively positioned at two sides of the ladder reinforcing steel bar 1 to form frameworks at two sides of the ladder reinforcing steel bar 1, as can be seen from the cross section sectional schematic diagram shown in fig. 2, the framework reinforcing steel bars are positioned in the cavity, if the blocking device 3 is attached to the inner side surface of the wall body, the blocking device 3 is clamped between the inner side surface of the wall body and the framework reinforcing steel bars, and the framework reinforcing steel bars play a role in supporting the blocking device 3 and the prefabricated wall body; if the inner side surface of the wall body is not attached with the blocking device 3, the framework steel bars directly contact the inner side surface of the wall body. The plurality of connecting rebars 7 are perpendicular to the framework rebars and are respectively fixedly connected with each framework rebar, for example, fixedly connected by welding, so that a welding spot 5 is formed at the joint of each connecting rebar 7 and each framework rebar. The connecting steel bars 7 connect the framework steel bars on the two sides into a whole to form support in the thickness direction of the wall body. The two ends of the connecting steel bars 7 extend out of the outer side of the framework steel bars respectively to be connected with the first steel bar net piece 2 and the second steel bar net piece 2. It is easy to understand, if the medial surface of wall body is equipped with blocking device 3, then the both ends of connecting reinforcement 7 pass blocking device 3 and stretch into in the wall body, link together with reinforcing bar net piece 2 in the wall body, make the shaping steel reinforcement cage become whole atress structure.

Further, both ends of the coupling bar 7 form hooks. For example, the angle of the hook may be 135 °. After the two ends of the connecting steel bars 7 extend out of the positions connected with the steel bar net piece 2, the ends of the connecting steel bars 7 form hooks through the steel bar bending device, and therefore the steel bar net piece 2 is hooked. The hook structure increases the firmness of connection between the reinforcing steel bars.

In one embodiment of the present disclosure, the ladder bar 1 is provided in plurality, and the framework bar is disposed in the longitudinal direction or the lateral direction of the wall body. If the ladder ribs 1 are transversely arranged (horizontally arranged), a plurality of rows of ladder ribs 1 are arranged at intervals in the longitudinal direction; if the ladder ribs 1 are longitudinally arranged (vertically arranged), a plurality of rows of ladder ribs 1 are transversely arranged at intervals, so that the stress in the thickness direction of the wall body is dispersed on the plurality of ladder ribs 1, and the stress strength of each ladder rib 1 is reduced.

In each of the above embodiments, referring to the schematic cross-sectional view at the door/window opening 4 of the exemplary embodiment of the disclosed laminated shear wall prefabricated member shown in fig. 3, the door/window opening 4 may be provided at the corresponding position of the first wall a and the second wall B. And the peripheral edge of the door and window opening 4 is poured with opening edge concrete 12 which is integrated with the first wall body A and the second wall body B. The blocking device 3 is arranged to be attached to the inner side of the concrete 12 at the edge of the opening and is integrated with the concrete. The existing superposed shear wall structure needs to support templates at the door and window openings 4, the templates have small area and poor fault tolerance, and a large amount of human, material and machine resources are wasted during actual construction, so that the superposed shear wall structure is a big problem for reducing the cost of the superposed shear wall. Through setting up blocking device 3 in entrance to a cave edge concrete 12's inboard, can directly pour the outside of blocking device 3 when pouring formation entrance to a cave edge concrete 12, reduce the use amount of template, reduced construction cost. Optionally, the adopted blocking devices 3 can be matched with the positions of the door and window openings 4, a sealing mode is formed around the positions of the door and window openings 4, and the blocking devices 3 are connected with the inner side surfaces of the wall bodies on two sides into a whole.

Further, the formed reinforcement cage further comprises a third reinforcement mesh 2, and the third reinforcement mesh 2 is embedded in the concrete 12 at the edge of the opening. The third reinforcing mesh piece 2 can increase the structural strength of the edge of the door and window opening 4.

In order to better embody the beneficial effects brought to the production process by the structure of the disclosed prefabricated member for the superposed shear wall, the following describes a production process of the prefabricated member for the superposed shear wall, the prefabricated member for the superposed shear wall adopts any one of the above embodiments, and the production process comprises the following steps:

the formed reinforcement cage is manufactured and formed and is connected with the blocking device 3 to form a whole. According to a drawing or a BOM list, a reinforcing steel bar processing device is used for processing the ladder bar 1 and the reinforcing steel bar mesh 2, and the blocking device 3 is cut; the ladder bar 1, the reinforcing mesh 2 and the blocking device 3 are built and connected into an integral structure. For example, now, a first reinforcing mesh piece 2 is placed on the mold table 8, a blocking device 3 is laid on the first reinforcing mesh piece 2, and the connecting reinforcing bars 7 of the ladder bar 1 penetrate through the blocking device 3 to be bound and connected with the first reinforcing mesh piece 2. And paving a blocking device 3 on the other side of the ladder bar 1, enabling the connecting steel bar 7 to penetrate through the blocking device 3, placing a second steel bar net piece 2 outside the blocking device 3 on the side, and binding the connecting steel bar 7 and the second steel bar net piece 2 together.

And placing a side formwork 9 on the formwork table 8, and pouring first wall body A concrete 10 in the side formwork 9 to form a first wall body A. Referring to fig. 4a and 4b, a first state diagram of the process for producing the prefabricated member of the laminated shear wall is shown. The first wall body A is formed by distributing and pouring concrete in a pouring range formed by the side molds 9 to form a wall body with a certain thickness. The height of the side forms 9 may be the same as or slightly greater than the thickness of the poured first wall a concrete 10, or the entire thickness of the entire laminated shear wall preform formed by the two walls.

And pressing the first side of the formed reinforcement cage into the first wall A. Referring to fig. 5a and 5b, a second state diagram of the disclosed laminated shear wall preform manufacturing process is shown. After the first wall body is poured and the surface of the first wall body is vibrated, the first side of the formed reinforcement cage is pressed into the first wall body A, so that the end parts of one side of the first reinforcement mesh 2 and the connecting reinforcements 7 of the ladder reinforcement 1 are embedded into concrete, and if the side is provided with the blocking device 3, the blocking device 3 is attached to the surface of the concrete to form a whole.

And pouring second wall body B concrete 11 outside the blocking devices 3 on the second side of the formed steel reinforcement cage to form a second wall body B. Referring to fig. 6a and 6b, a third state diagram of the manufacturing process of the disclosed laminated shear wall prefabricated member is shown. After the maintenance of first wall body A is accomplished, make first wall body A place down on mould platform 8, lay side forms 9 at the second side as required, the cloth concrete is gone up to the barrier device 3 of direct second side in side forms 9, the barrier device 3 of second side can prevent second wall body B concrete 11 to pass barrier device 3 downwards this moment, so can directly pour formation second wall body B on barrier device 3, the process of upset has been removed from, the shaping is fast, high quality.

And after the second wall body B is poured, the side mold 9 is removed, and the wall body is placed into a curing cellar for curing. Referring to fig. 7a and 7b, a fourth state diagram of the manufacturing process of the disclosed laminated shear wall prefabricated member is shown.

Optionally, when the first wall a is formed, after the side forms 9 are set, the formed reinforcement cage may be placed on the form table 8 within the casting range surrounded by the side forms 9, the embedding depth of the formed reinforcement cage is controlled, and if the blocking device 3 is arranged on the side, the blocking device 3 is attached to the surface of the concrete after casting. And then distributing and pouring concrete in the pouring range. According to the method, one side of the formed reinforcement cage is directly embedded into the first wall body A, so that the step of pressing the reinforcement cage into the first wall body A is omitted, the construction efficiency is improved, and the position control among all the members is more accurate.

The following is a preferred exemplary embodiment of the production process:

1. according to drawing or BOM list, use reinforcing bar processing to equip processing ladder muscle 1, reinforcing bar net piece 2, cutting stop device 3.

2. Connecting steel bars 7 in the ladder bars 1 penetrate through the blocking devices 3 to form a hook, and then are bound and connected with the steel bar net pieces 2 on the two sides. Alternatively, in the case that only one side has the blocking device 3, one end of the connecting steel bar 7 can be pre-processed into a 135-degree hook and directly connected with the steel bar mesh 2 on the side without the blocking device 3 in a binding manner.

3. And (3) placing a side die 9 on the die table 8 according to a drawing or a BOM list, and if the door and window opening 4 exists, also placing the side die 9 around the door and window opening 4. The height of the side forms 9 can be the same as the thickness of the first wall body, and can also be the same as the whole thickness of the whole laminated shear wall.

4. And after the pre-embedded parts in the first wall A are reserved, distributing the materials to the specified thickness of the first wall A by using concrete pouring equipment.

5. And pressing one side of the formed reinforcement cage into the first wall A. Optionally, the formed reinforcement cage can be placed in advance, and then the first wall body A is distributed, wherein the first wall body A can be obliquely distributed, and other distribution modes can be used to guarantee that the concrete can smoothly flow into the pouring range surrounded by the side formwork 9.

6. In some cases, for example, there is no door/window opening 4, when the area of the prefabricated wall panel is small, the ladder bars 1 located in the middle regions of the two walls may not be arranged, but the connecting steel bars 7 for forming the ladder bars 1 are reserved, that is, only the connecting steel bars 7 arranged along the thickness direction of the wall are arranged in some regions. In some cases, for example, when the ladder bar 1 cannot bear the weight of the second wall B or the ladder bar 1 is absent, the support jig may be used to assist in supporting the second wall B for casting.

7. On the premise of ensuring that the height of the side forms 9 is the same as the thickness of the whole superposed shear wall, distributing the second wall body, and pouring the second wall body B on the blocking device 3 on the side.

8. And finally, placing the mixture into a curing kiln for curing.

The laminated shear wall prefabricated part and the production process thereof have the advantages of high forming speed and high quality, and can be produced by using simple equipment. The formed reinforcement cage is reasonable in arrangement, and the completeness of the member in the member hoisting process is guaranteed. The arrangement mode of the blocking devices 3 enables the components to be connected with the adjacent transverse vertical components well to form a whole after being hoisted, and the structural integrity and the hoisting rapidness and easiness are guaranteed.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. A laminated shear wall preform, comprising:

2. A laminated shear wall preform according to claim 1 wherein the blocking means is a sheet-like member or a hollow shell-like member extending along a plane.

3. A laminated shear wall preform according to claim 2 wherein the blocking means comprises a quick-release net.

4. A laminated shear wall preform as in claim 1 wherein the formed reinforcement cage comprises:

the first reinforcing mesh is embedded in the first wall body;

the second steel bar net is buried in the second wall body; and

5. A laminated shear wall preform according to claim 4 wherein the ladder bar comprises:

6. A laminated shear wall preform according to claim 5 wherein the ends of the connecting reinforcement form hooks.

7. A laminated shear wall preform according to claim 5 wherein there are a plurality of said ladder bars and said skeletal reinforcement is disposed longitudinally or transversely of the wall.

8. A laminated shear wall preform according to any one of claims 4 to 7 wherein a door or window opening is provided in the first wall and in the second wall at a location corresponding thereto; hole edge concrete integrated with the first wall body and the second wall body is poured on the peripheral edge of the door and window hole; the blocking device is attached to the inner side of the concrete at the edge of the hole and is combined with the concrete to form a whole.

9. A laminated shear wall preform according to claim 8 wherein said formed reinforcement cage further comprises a third mesh of reinforcement embedded in concrete at the edge of said opening.

10. A laminated shear wall preform according to claim 6 wherein the angle of the hooks connecting the ends of the reinforcing bars is 135 °.